3 Answers
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Yes, as with many of the Galaxy devices it appears that the unlock code is actually stored on the device and easily accessible (as long as you have root access).

This XDA post should guide you through it. Note of course that it might not work and you could brick your device by rooting, in addition to voiding the warranty. In my experience the Galaxy devices are hard to brick and unlikely to be problematic.

Free methods to unlock Samsung Galaxy Ace are not safe ,They may cause permanent damage to the phone . To unlock your phone safely and easily ,you can use Unlock codes .You can get the unlock code from your service provider or from online vendors like SuperUnlockCodes.com .